Year	% (national estimate)
1990	42.3
1991	40.5
1992	38.3
1993	40.6
1994	41.1
1995	45.7
1997	61.152
1998	60.132
1999	60.958
2000	60.967
2001	58.475
2002	65.007
2003	59.301
2004	63.424
2005	61.056
2006	64.248
2007	66.881
2008	67.017
2009	67.574
2010	69.004
2011	68.464
2012	68.224
2013	67.371
2014	66.88
2015	65.329
2016	64.973
2017	66.632
2018	67.097
2019	67.377
2020	55.628
2021	61.173
2022	63.23
2023	61.324